Natural liquid as well as preparation method and application thereof

A natural, reactive liquid technology, applied in the direction of botany equipment and methods, applications, chemicals for biological control, etc., to achieve the effect of increasing production capacity, significantly killing mosquitoes, and avoiding a large amount of waste

Active Publication Date: 2016-01-06
厦门琥珀香精股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanism of action of these pyrethroid insecticides is similar to that of DDT. They are axon poisons and have the characteristics of fast knockdown, strong insecticidal power, broad spectrum, low toxicity, and low residue. However, after long-term use of similar insecticides, mosquitoes Strong resistance to pyrethroid insecticides

Method used

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  • Natural liquid as well as preparation method and application thereof
  • Natural liquid as well as preparation method and application thereof
  • Natural liquid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation of embodiment 1 natural liquid

[0030] A. Take 200g of citronellal, 220g of p-menthane-3,8-diol, 2.5g of p-toluenesulfonic acid, 100g of cyclohexane for reflux dehydration, and react at 90-100°C for 4 hours to obtain the natural liquid crude product a;

[0031] B. The natural liquid crude product a obtained in A is neutralized with 400g of 1% sodium carbonate solution, washed to neutrality, left to separate liquids, and natural liquid crude product b is obtained;

[0032] C. Place the natural liquid crude product b obtained in B in a fractionation still, and perform vacuum fractionation at 1kPa. The steam temperature at the top of the column is 54-130°C, the liquid temperature in the fractionation still is 88-144°C, and 50g of low-boiling substances are distilled out. The final product is natural liquid, weighing 340g, analyzed by gas chromatography-mass spectrometry, in which 2-[2,6-dimethyl-5-heptenyl]-4,4,8-trimethyl-1,3- The content of hexahydroben...

Embodiment 2

[0033] The preparation of embodiment 2 natural liquid

[0034] A. Add 1283g of 2.5% sulfuric acid solution to 500g of lemon eucalyptus oil, stir and react at 30°C for 19h, and remove the acid solution to obtain crude p-menthane-3,8-diol;

[0035] B. Take 50 g of the crude p-menthane-3,8-diol obtained in A, add 50 g of lemon eucalyptus oil and 0.5 g of p-toluenesulfonic acid, vacuum dehydrate at 60° C., and react for 4 hours to obtain the natural liquid crude product a;

[0036] C, the natural liquid crude product a obtained by B is neutralized with 100g 2% sodium carbonate solution, washed to neutrality, and left to separate liquids to obtain the natural liquid crude product b, with a crude product weight of 95g;

[0037] D. Place the natural liquid crude product b obtained in C in a fractionation still, vacuum fractionation at 1kPa, the steam temperature at the top of the column is 54-130°C, the liquid temperature in the fractionation still is 88-144°C, and 28g of low-boiling...

Embodiment 3

[0038] The performance detection of embodiment 3 natural liquid

[0039] Add the final products of Example 1 and Example 2 to deodorized kerosene in an amount of 4% to make an electric mosquito-repellent incense liquid sample. The sample is entrusted to the Chinese Center for Disease Control and Prevention to conduct a mosquito-killing effect test. The results are shown in Table 1.

[0040] Table 1

[0041]

[0042] The test results show that the natural liquid obtained by the invention has a good anti-mosquito effect.

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Abstract

The invention discloses natural liquid as well as a preparation method and application thereof, and relates to mosquito killing liquid. The natural liquid is prepared from the following raw materials of p-menthane-3,8-diol, citriodora oil or citronellal and a catalyst, wherein the mass ratio of the p-menthane-3,8-diol to the citriodora oil or citronellal is 1:(0.5 to 2); the adding amount of the catalyst is 0.1 to 2 percent of the p-menthane-3,8-diol according to the mass percentage. The citriodora oil or citronellal and the catalyst are added into the p-menthane-3,8-diol, so that after dewatering reaction, the reaction liquid is purified, and the natural liquid is obtained. The natural liquid can be applied to mosquito incense liquor; the content of the natural liquid in the mosquito incense liquor is 2 to 10wt%, and the balance is a solvent; after 30 minutes, the mosquito knockdown rate is not less than 95 percent, the avoidance rate is not greater than 5 percent, and the total mosquito expelling rate is up to 100 percent. The natural liquid is directly separated and extracted from eucalyptus citriodora oil, so that waste of a large quantity of eucalyptus citriodora raw materials can be avoided, the cost can be reduced, and the yield can be increased.

Description

technical field [0001] The invention relates to a mosquito-killing liquid, in particular to a natural liquid and its preparation method and application. Background technique [0002] The buzzing of mosquitoes in summer brings not only troubles, but mosquito bites may also bring severe infectious diseases such as Japanese encephalitis, malaria, dengue fever, yellow fever, filariasis, West Nile fever, and kala-azar. In addition to environmental improvement and physical isolation, sanitation insecticides and mosquito repellents are the last line of defense against mosquitoes. Because hygienic insecticides are in close contact with the human living environment, their high insecticidal activity and low toxicity requirements limit most insecticides to be practical mosquito killers. Although the mosquito-killing products used indoors come in different forms such as mosquito coils, electric mosquito coils, and electric heating mosquito coils, all of them contain natural pyrethrins ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/28A01N49/00A01N25/18A01P17/00A01N43/32A01N31/06
CPCY02A50/30
Inventor 张森雄曹蔚
Owner 厦门琥珀香精股份有限公司
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